Problems with the RTC, can not save time/date


I 've installed QNX 6.3 on a pc with ATI Radeon 9100IGP/IXP200 chipset.
It seems that there are lots of problems with this chipset.
I think i could not access the CMOS correctly because when I try to save the time/date and reboot, the time is set to 01/01/1970 01:00.

Any ideas ?